Vacuum-operated liquid-fuel-feeding device.



E. R. HAWLEY.

VACUUM OPERATED LIQUH) FUEL FEEDING YJEVICE APPLICATION F ILED FEB. 25.1916.

Patented Feb. 20, 1917.

2 SHEETS-SHEET I.

WITNESSES E. R. HAWLEY. V I

VACUUM OPERATED uoum- FUEL rzaumc DEVICE,

A PPLHJATiON FILED FEB 25- I915. v

Patented Feb. 20, 1917.

2 SHEETS-SHEET 2.

INVENTOI! EDGAR R. HAWLEY, OF SALT LAKE CITY, UTAH.

VACUUM-OPERATED LIQUID-FUEL-FEED ING DEVICE.

Specification of Letters lateut.- Patentgd l el 20, 1.91 7.

Application filed February 25, 1916. Serial No. 80,551.

To all whom it may concern Be it known that I, Enoaa 1i. IIAWLEY, a

citizen of'the United States, and'a resident .of' Salt Lake (.it y., in the county of Salt. 5 Lake and State of I'tah. have invented a new and Inna-rived Vacuum -()perated .Liqllid-Fuel-Feeding Device; of winch the a following is a full, clear, and exact description; Mv' invention relates to a means for feedin'gdiquitl fuel to an internal combustion engine, and particularly to a feeding device for the indicated purpose, the'o 'leration of which is controlled by the suction produced by the engine when in operation. v

, The objects and advantages of my improved feedingtlevice will appear asthe description proceeds.

Generally speaking, an objectof the in- 2t vention is to provide a feeding device as characterized, improved in various particulars with a View toinsure reliability of oporation as' well as to provide for accuracy of adjustment and control.

Reference is to be had to the accompany-' communicates with the interior of the casing 10 at the top through a suitable connection 18.

The numeral lfldesignates an outlet pipe from the bottom of the casing l'tl. lcadint to the float chainbcr Qtlof the carlnlrcterl (omnumication between the pipe [I and the casing 10 is established b v any suitable. connection 21 and a chamber 22 having a port 23 leading to the interior of said. casing at the top; Said port El -Bis regulated by a screw valve 2 The feed device is divided horizontally pipe I? and any into chambers, there being an'uppcr fuel receiving chamber 25. within which is erected a cup 26. having a float :27 therein. Ahorizontal partition 38 wcparati-rs the re ceiving chamber 25 from a second fuel chamber29, beneath said first chambcig Thc fuel chamber 29 contains a tloat. Sit) having a valve Slat the top movable with the float to and from a seat 32 to control a vertical ing drawings forming a 'part of this specification in which s milar reference characters indicate corresponding parts in all or the views. 4

30 Figure l is a vertical/section of a feeding device embodying myinvention;

Fig. 2 is a horizontal section on the line 2-2, Fig. 1;

Fig. 3 is a side elevation of the in connection with a fuel supply, a carbureter, and an internal combustion engine, re )resentetl diagrainmaticall v.'

y improved feeding device includes a shell or casing designated generally by the numeral 10, front the upper portion of.

The pipe 11 which a suction pipe ll leads. may be variously connected with a carbureter, intake manifold or engine to be subject to the suction of the latter, but I prefer to conm-ctvthc said pipe 13at a point- .12 that will-cause the air from the pipe 11 to be drawn past the carbureter nozzle to thereby take u 3 its proportion of fuel and thus not inter ercwith 'the functions of the carbure er. The carbu1.'eter,'as conventionally shown. is connected with the manifold 14 of an engine 15, as usual.

The numeral 16 designates a fuel supply which is under atn'u'is 'ihcric pressure and 11 with a carburetei feeding de- 35v1ce, showing the same 111 posltlon for use passage 32 formed in the partition and. communicating with the chznnbers 5, 29.

Below the fuel chamber 29'is a third chamber 33. constituting: a reservoir. from which the fuel is drawn gas required by thc -arbureter, throtuzh-the pipe. 19. The-reset" voir33 may be formed by a separate, shell section 10. The pipe 19 communicates with the reservoir 33 through any suitableconnection 34. A drain cock 35 may be provided for the reservoir 3?. i I

An opening- 36 leads through the horizon- .tal partition 37, separatingthe chamber 2!) from t'l' e'reservoir 33, and said opening'is commanded by a pivoted valve 39 having a counterbalance arm 39.

" feed by a reciprocating valve. 46.

chamber 29, through the cup 26 and pr through the space 48' and a The reservoir 33 is vented through a port .40 anda pipe 411 communicating therewith and ha ring, its outlet end r'Q'above'the .chamb'er 25.

device 16) from the connection 1 8 through a screen 43, and a port l4 formed 111 a screw plug -15, saldport. being controlled leads to a pipe 47 that extends in the chamber 25 of the cup 26. to communicating with the next lower fuel ssage down ward-1y into the space 48 outside- -The chamber 25, n1- addition The port 44 32, Emnnmicatt-s" also with said chamber 49 m the partition 28 at said space;

vertical. passage.

A stem 50 on the float 27 is rovided at its valve without opening the casing; To permit rela 've rocking of. the float 27, without aflecting the valve 51, the'stem :50 is loosely connected to said float, there being a head 56 on thestem received in a box 57 on the float, said stern extending through the screw cap 58 of the box. D

The suction produced in the pipe 11 by the-operation of the engine will result in producing a partial vacuum in the feed de-' vice l0 and the forming of the vacuum Wlll result in closing the valve 38. Fuel entering from, the supply pipe 17 w ll pass through the port 44 and pipe 47 into the space 48 of chamber'25 and through the passage 49 into the fuel chamber 29. As the fuel accumulates in the chamber 29, the float willrise and close the passage 32. The continued flow of the fuel from the-pipe '47 will cause the same to rise through the passage 49 and accumulate in the space 48 of chamber 25 until finally the 'fuel overflows in the cup 26,-thereb causing the float 27 to rise and thereby li from'its-seat and permittin air to flow through the inlet 53, thus brea ing the vacuum caused by suction in the pipe, 11. Thevrestoring of the atmospheric pressure in the several chambers-results in the valve .38

opening, and the fuel in the chamber 29 and the space '48 of chamber 25 will run by gravity into the reservoir '33. When the fuel from the reservoir. 33-is consumed by the carbureter to an extent to float 30 to fall, the passage 32 will be 0 ened permit the and the fuel from the cu 26 willflow c ownwardly to chamber 29 andreservoir 33 untilthe float 27 falls and brings the valve 51' to its seat 52-, thereby closing the air. inlet 53, whereupon the suhtion-i-n thejpipe.11,w-ill= cause the operation to be repeated. 'Itis .to' be observed that there'is open and. constant suction pipe 11 and the interior of theifeed device, whether:

communication between the the valv'e 51 is openv or closed.- Thus,'the

operation of the 'feed device is insured Witliout providing" any means to make and. break the communication between the suction pipe, and the feed device, thereby simplifying the construction.

' thus ,vary the eriod ofbperation e' described a oration presupposes a fuel supply at 1 6 j ow the level of.the inlet port 44. In orderto insure a'positive cut ofi'jof the fuel from latter, is at a higher 'the fuel continue to' ting the valve 51 It is to be observed also, considerably larger than the port 23' and "that when a vacuumis device, the

The only control of the suc; .tion through the adj ustment of the screw .valve "24 to vary'theport 23'and as may beg-required.

the supply 16, when the" level than the-port 44, I

provide on the valve stem 50, trips 59, 60,

which are disposed above and below an arm 61: of a bellcrank lever, the other arm of said lever being in engagement with the stem 62, of the valve 46 controlling the passage 44: Thus, when the valve 51 is raised.

and fuel is flowing into the feed device,

the upper trip 60will engage the 'bellcrank lever 61 and open the valve 46. The provision of the means to positively close the valve 46, prevents a possible overflow of the fuel in the port 23 and air passage 53, should rise in the chamber 25 from any cause otherthan that of a fuel supply above the port 44.

' The level at which the fuel supply will be cut oil by the valve 46 may be varied by adjusting the screw plug 45 to or from the said valve 46'. Referrin 31, Iwould explain that it is importantto keepiyie air valve 51 open some. little time to aintain the vacuum broken and thus allow the accumulated 'liquid in the chamber again to the float 30 and valve 48 and cup o'r float chamber 26 to run into the :reservoir below, and the float 30 and valve 31, his to be 'un der tood, is given as 26 and thus maintaining the float 27 raised.

that the valve 51" has considerable area so produced-within the ressure upon the valve 51 at the underside is less than the atmospheric pressure acting on the upper side of the valve; the area" of relatively to the size of the float 27 is that the float 27 is held down' 7 float than ."would be required to float the same if the 2 difference of pressure did not exist on'the the valve 51 being appreciable a result until-the liquid rlses'higher around said valve 51.' With this arrangement, whenthe valve 51 finally opens,.it is suddenly raised ,to a considerable' 'd'istance a's'thel'pressure within and without is the i accumulatedgasolene in the.

,26 raises the said valveraisingthe float-272 The described construction-affords a practical mean will state m conclusion. that I do not limit myself to the mechanical details herein illustrated si'nce=manifestlythe same canbe considerably varied without departure from the spirit of the invention,- as defined it the appended claims.

Having thus described my that the port is same and the invention I s for. carrying myinvention into 1 -efl'ect and'I 1. An apparatus of the class described including a reservoir, in the bottom thereof,-

a fuel-receiving chamber at the'top of the -fceding device, a second fueLre'ceiving chamlier l'ieneatli the first chamber between the same and the reservoir, there being an open- .ing from the upperchamber to the intermediate chamberand an opening from the intermediate chamber to the reservoir, means to connect the reservoir with a carburetor to deliver fuel to the latter, means to"conncct the upper receiving chamber with a fuel supply, said upper chamber having an air inlet, continuously acting suction-producing means communicating with the upper chamber and tending to produce a vacuum in the feeding device, a valve con trolling. the opening between the intermediate chamber and the reservoir and subject to vaculun in, the feeding device, a. floatoperated valve in the intermediate chamber controlling the opening leading .to said chamber from the upper chamber, a float in the upper-chamber, and a valve operated by said float and controlling the saidalr inlet.

An apparatus of the class described including" a reservoir, means to connect said reservoir with a carbureter to deliver fuel to the, latter, a fuel-receiving float cham-.

ber above the reservoir, :1 fuel-receiving float chamber above the first chamber, said feeding devicchavinga fuel inlet, the first chamber havin r an openingfor the flow thereto of fuel, the said chambers communicating so that fuel after filling the first receiving chamber will rise in the float chamber above, continuously acting means tending to draw in the fuel from the said supply, means to intermittently cause the cessation of the fuel delivery, a float in the upper chamber controlling said last-mentioned means, a float in the second chamber, and a valve controlled by said second floatand controlling comnumication from. the upper float chamber to the said first chamber.

3. An ap iiaratus of the class described ineluding a reservoir, means to connect the reservoir with a carburetor to deliver fuel to the latter, a fuel-receiving chamber above Y the reservoir and having an outlet in the bottom thereof, means to establish communication between the said outlet and the reservoir, a fuel-receiving float chamber in said first chamber, a float in t 1e float chamber, means to produce a vacuum in the said chambers, an air inlet leading to the first chamber, a valve controlling said air inlet and operated by the rising and falling of the float to admit air and the latter,

the said cup attached to and Ysald valve means,a. float in th her and a valve controlled by the last menbreak the vacuum for permitting fuel to flow to the reservoir, and means independent of the outlet in the bottom of the first chamber to dischar the fuel from the float chamber'and permit the float to fall after the level of the fuel has lowered in the first nentioned chamber.

4:. An apparatus of the class described including a reservoir, means to connect said reservoir with a carbureter to deliver fuel to a fuel-receiving chamber above the reservoir, the bottom of the said chamber having an outlet, means to establish com-, munication between said outlet and the reservoir, a float chamber within the first mentioned chamber and in communication with said chamber at a point considerably above the bottom of the float chamber, the bottom of the said float chamber having an outlet means to establish communication between the last-mentioned outlet. and the' means controlling the outlet of to ,deliver fuel a above the said chamber-,9, fuel-supply means delive'ringjo said feeding device, the said chamber having 'an'opening for the flow thereto of'fuel delivered from said supply, the said chamber and cup communicating so, that fuel after filling the said first chamber will rise and overflow into the said cup at the top, means for retaining the liquid in thesald .cup until the liqu1d surrounding the cup and in said chamberhas been drawn ofl' to-a certain level, means for allowing the liquid to flow from/the said cup, continu-" ously acting means tending to draw the fuel from said supply, valve means to intermittentlyv cut off the fuel delivery, a float in controlling the tione'd floa't, said valve controlling outlet from the cup to said chamber.

. In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

, EDGAR R, HAWLEir.

Witnesses:-

FRANK W. WILLIAMS,

JOSEPI-l R. HAAS.

.c said cham- 

